Model of strength developedwithresponse surface methodology for solidified marine soft clay of Hangzhou
XU Ri-qing1, CHANG Shuai1, YU Yuan-hong2, LU Jian-yang1
1.Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, 310058, China; 2.Zhejiang Reclaim Construction Group Co., LTD., Zhejiang,Ningbo, 315040,China.
In order to consider comprehensively the influence of initial water content, organic matter content, mixing ratios of cement and CX-13 agent on solidification, and further propose solidification schemes for different soils pertinently, response surface methodology (RSM) based on central composite rotatable design (CCRD) was employed for experiment arrangement, in which response values were unconfined compressive strength of 28 days andindependent variables were initial water content, organic matter content, mixing ratios of cement and CX-13. By regression analysis of test results, a quantitative model between independent variables and response values was constructed, mutual-influences of independent variables were analyzed, and mechanism of mutual-influences was explored. The result shows thatorganic matter content corresponding to the peak value of strength reduces with the increase of cement mixing ratiowhileinitial water content and CX-13 mixing ratioarefixed,initial water content corresponding to the peak value of strength grows with the increase of cement mixing ratiowhileorganic matter content and CX-13 mixing ratioare fixed. The optimal cement mixing ratio is positively related with CX-13 content once organic matter content and initial water content are fixed.
XU Ri-qing, CHANG Shuai, YU Yuan-hong, LU Jian-yang. Model of strength developedwithresponse surface methodology for solidified marine soft clay of Hangzhou. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(11): 1941-1946.
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